It is not recommended to run a 40-amp stove on a 30-amp breaker. Breakers are designed to protect electrical circuits and appliances from overcurrent, which can cause overheating and potentially lead to electrical fires.
A 30-amp breaker is designed to handle a maximum continuous current of 30 amps. If you try to run a 40-amp stove on a 30-amp breaker, the breaker will likely trip frequently because it cannot handle the higher current demand.
When dealing with appliances like stoves that require specific electrical requirements, it is essential to use the correct circuit breaker and wiring size that matches the appliance's needs. In this case, you should use a 40-amp breaker with appropriately sized wiring to accommodate the stove's electrical load.
If you are unsure about the electrical requirements or the proper setup for your stove, it is best to consult a licensed electrician to ensure the safety and compliance of your electrical system. Electrical work should always be done by qualified professionals to avoid potential hazards.